ZIP Code 18065 — Neffs, PA
18065 is a standard (street delivery) ZIP code serving Neffs, Pennsylvania, in Lehigh County. To mail something here you only need these five digits — but the four-digit extension narrows delivery to a single point, and it is what USPS bulk postage discounts are priced on.
ZIP code 18065 at a glance
| ZIP code | 18065 |
|---|---|
| Primary city | Neffs |
| State | Pennsylvania (PA) |
| County | Lehigh FIPS 42077 |
| ZIP type | Standard (street delivery) |
| Time zone | America/New_York |
| Population | 577 |
| Coordinates | 40.698140, -75.610860 |
How ZIP+4 works in 18065
The four digits after the hyphen encode a delivery segment inside 18065. In practice one segment usually means:
- One side of one block — odd numbers on a street between two cross streets
- A single large building, or one floor of it
- A group of PO boxes, sometimes a single box
- A single business that receives enough mail to warrant its own code
That is why 18065 has no single ZIP+4: two neighbors across the street from each other usually have different ones. Enter a street address above and we will return the exact nine-digit code along with the standardized USPS address format.
Nearby ZIP codes
Showing the closest twelve. See every ZIP code within 25 miles of 18065.
| ZIP | City | Distance |
|---|---|---|
| 18078 | Schnecksville, PA | 1.9 mi |
| 18080 | Slatington, PA | 2.9 mi |
| 18037 | Coplay, PA | 3.6 mi |
| 18079 | Slatedale, PA | 4 mi |
| 18059 | Laurys Station, PA | 4.3 mi |
| 18086 | Treichlers, PA | 4.3 mi |
| 18069 | Orefield, PA | 5 mi |
| 18035 | Cherryville, PA | 5.1 mi |
| 18088 | Walnutport, PA | 5.4 mi |
| 18053 | Germansville, PA | 5.4 mi |
| 18052 | Whitehall, PA | 6.3 mi |
| 18104 | Allentown, PA | 6.9 mi |
Questions about 18065
What is the ZIP+4 code for 18065?
18065 is the five-digit ZIP code. The ZIP+4 adds four more digits that identify a specific delivery point — usually one side of a city block, a single building, or a group of PO boxes. Because those four digits change from address to address within 18065, you need to look up a specific street address to get them.
What city is 18065?
18065 is assigned to Neffs, Pennsylvania, in Lehigh County.
Do I need to use the ZIP+4?
It is optional for ordinary mail, but it speeds up sorting and it is required for most USPS bulk-mail postage discounts. Many address-verification and e-commerce systems also use ZIP+4 to confirm a delivery point exists.
Need thousands of these?
Upload a CSV and get ZIP+4, county, carrier route, and delivery-point data appended to every row — or call the API directly.